Error: The provided login data to access mail server imap.comcast.net seem to be wrong. Please correct them.

Having some serious trouble with my email address's. Can't access any of my emails. The real friendly comcast store associate was unable to help. We tried for an hour and a half working on it. Was even unable to create a new email address to see if that worked. Nope did not.  There is something going on in the mail server. The settings that xfinity suggested did not help. Has anybody run into this issue. Hey, Xfinity technical people please check into your mail servers the primary email address on account seems to be ok, but I don't use that one publicly. I need help from the email borg collective (LOL). Thanks  Jeff

E-Mail

• [Edited: "Personal Information"]
  
  
  Edit
  The entered credential or authentication information does not work or are no longer accepted by provider. Please change them.
• [Edited: "Personal Information"]
  
  
  Edit
  The entered credential or authentication information does not work or are no longer accepted by provider. Please change them.
• [Edited: "Personal Information"]
  
  
  Edit
  The entered credential or authentication information does not work or are no longer accepted by provider. Please change them.
• [Edited: "Personal Information"]
  
  
  Edit
  The entered credential or authentication information does not work or are no longer accepted by provider. Please change them.